Is there any RGB and CMYK difference by using the CardDésirée CS?

Yes, there is a difference, CardDésirée CS prints the image in 『RGB, color space』 base. If your original image is in 『RGB, color space』, CardDésirée CS can faithfully perform the color. If your original image in PhotoShop is in 『CMYK, color space』, the performance in CardDésirée CS might be different from the printout through PhotoShop. Therefore, it's essential to transfer the color space from 『CMYK, color space』 into 『RGB, color space』 firstly to give out the real color/detail. Go to 『image/mode』 to change the color space to 『RGB, color space』in your PhotoShop.